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MY RX8 IS GOING CRAZY!!!! 2004 rx8 (Electrical problems)

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Old 04-07-2013, 09:43 PM
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MY RX8 IS GOING CRAZY!!!! 2004 rx8 (Electrical problems)

Well,my rx8 is losing it.
In my dash my high beam light stays on(when they really are not) they stay on until i turn off my foglights(my fogs are not working either) also,when i turn off my ac my radio turns off and then turns back on,i do not know what it may be,please help.
Any suggestions!!!!
Old 04-07-2013, 09:51 PM
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Anyone please help!
Old 04-07-2013, 10:15 PM
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MY RX8 IS GOING CRAZY!!!! 2004 rx8

well my rx8 is going completely crazy!!!

in my dash my high beam light stays on when they really are not,the light in my dash turns off when i turn off my fog lights(my fog lights are not wanting to turn on also) also,when i turn off my ac,my radio just turns off and then turns back on by itself,i do not know what it may be! my alternator went bad and i replaced it with a brand new one,could it be that the bad alternator made the computer go bad or something? I'm puzzled! someone please help,any suggestions please!



Old 04-07-2013, 10:53 PM
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my alternator went bad and i replaced it with a brand new one,could it be that the bad alternator made the computer go bad or something? I'm puzzled! someone please help,any suggestions please!
Old 04-08-2013, 12:43 AM
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Sell it...lol

It might be a wiring or grounding problem of some sort...

Might be the alternator is not giving enough volts. A normal alternator should have 13 to 14.5 volts. Did you replace it with a new one or a refurbished one?
Old 04-08-2013, 07:14 AM
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I believe you asked this question in another thread...
It doesn't require two.

2004 rx8 problems
Old 04-08-2013, 10:51 AM
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thats what i was thinking,wiring or grounds
and i replaced it with a new one,and its fine 14 volts
Old 04-08-2013, 03:57 PM
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Did this happen all of a sudden? Water damage? If the cause is a simple grounding problem, you might be able to find the cause of it by tracing the grounding of all the affected components to see if it comes to a common point. If the alternator just stopped providing adequate power, it shouldn't hurt the computer, unless there was a large voltage spike - not sure if this happens with alternator failures.

I'm not familiar enough with the RX-8's electrical layout to be of too much help here, but I would say your only hope is going through the wiring diagrams to hopefully find a common source of the issues.
Old 04-08-2013, 04:01 PM
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Threads merged and moved to Troubleshooting.
Old 04-08-2013, 04:21 PM
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My first thought would be to check and see if a previous owner had installed something electrical (speakers, radio, car alarm, fog lights, etc.) that necessitated playing around with the wiring.
Old 04-09-2013, 12:19 AM
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1. Check Headlight relay & fog lamp relay
2. Check headlamp switch as hi beams, fogs, and instrument cluster ground through it.
3.Check JC-10 Ground connector on the upper left section of the dash as high beams, fogs, instrument cluster, climate control ground through it.

For the second part with the AC & radio.. Does your Dash illuminate properly? and do you have Bose audio or not?

Last edited by Mr.Mango; 04-09-2013 at 12:25 AM.
Old 05-08-2015, 07:40 PM
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Second part

Originally Posted by Mr.Mango
1. Check Headlight relay & fog lamp relay
2. Check headlamp switch as hi beams, fogs, and instrument cluster ground through it.
3.Check JC-10 Ground connector on the upper left section of the dash as high beams, fogs, instrument cluster, climate control ground through it.

For the second part with the AC & radio.. Does your Dash illuminate properly? and do you have Bose audio or not?
Mr mango
In reference to your ac & radio comment. I believe I'm having the same issue and my dash does not illuminate properly as well as the fact I do have a Bose audio. Is all this related to the AC/radio issue? Thank you
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